Innovative solutions to sustainable Soil Phosphorus management
, Universität BonnProject number: 031B1061A
Contact: Prof. Dr. Peter Leinweber, University of Rostock
Project team: University of Rostock, Julius-Kühn-Institute, Technische Universität München, Brandenburgische Technische Universität Cottbus, Forschungszentrum Jülich, Bergische Universität Wuppertal (BUW), University Bonn
Link Website: www.innosoilphos.de
Duration: 03/04/2021 – 30/04/2024
New evidence in all aspects of P-speciation and P–transformations in the system soil-crops-environment will result in improved P-fertilizer recommendations, approaches to mobilize unavailable P-stocks in subsoils, application guidelines for innovative P-recycling products, novel concepts for “smart” P-fertilizers with by-effects as well as recommendations for policy makers. InnoSoilPhos will provide the BonaRes-center with all P-specific soil data, pedotransfer functions and concepts for web-based soil-function-models.
Project results from phase 1
Quantum-chemical modelling revealed the binding energy of phosphate and organic P-compounds (e.g. glyphosate) on reactive soil surfaces. Enzymatic and molecular-biological investigations on rhizosphere showed mechanism of P-mobilization under the influence of different management strategies. Data analysis of long-term field experiment resulted in crop-specific phosphorus supply as well as fertilizer policy. Improved and decreased P fertility classes were derived from data sets, which could lead to saving potentials in fertilizer application. Reduction of P-losses in waters necessitate the control of peak discharges in drained areas. P return of bones by means of pyrolysis and interim use of bone char as absorber material is targeting the conservation of geogenic P resources by recycling. P management derived by the project can be improved due to regulatory and economic control instruments.
Project results from phase 2
Integrating the results from Phase II, improvements in agricultural P use can be achieved at all relevant scales because all WPs found approaches, either to mobilize P already stored in soil, avoid unnecessarily high fertilization, mitigate P losses or to better use recycling P fertilizer materials and open up ways to a political and legal framework of improved P governance.
Expected results phase 3
The overall objective of InnoSoilPhos is to gain scientific knowledge and define socio-economic and political/legal frameworks for (1) improving the efficiency of P-use in agricultural production, (2) maintaining and improving soil fertility with respect to the nutrient P, and (3) developing new technologies and products to protect global P-resources. In the third phase of InnoSoilPhos, building on the results of Phases I and II, four implementation-oriented research questions are to be addressed: (1) Improvement of biological P-mobilization in soil, (2) Design, Production and Testing of new “smart” P-fertilizers from recycled materials, (3) Reduction of environmentally harmful P-losses at field scale, and (4) Phosphorus in integrated nutrient cycles.